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Resilience, Social-Ecological Rules, and Environmental Variability in a Two-Species Artisanal Fishery Ecology and Society
Duer-Balkind, Marshall; Department of the Environment, Washington, DC; School of Forestry and Environmental Studies, Yale University, New Haven, CT, USA; marshall@aya.yale.edu; Jacobs, Kasey R.; NOAA Coastal Management Fellow at the Puerto Rico Coastal Zone Management Program, San Juan, PR; School of Forestry and Environmental Studies, Yale University, New Haven, CT, USA; kasey.jacobs@aya.yale.edu; Basurto, Xavier; Duke Marine Lab, Nicholas School of the Environment, Duke University, Beaufort, NC, USA; xavier.basurto@duke.edu.
Social-ecological resilience is an increasingly central paradigm for understanding sustainable resource management. In this study, we aimed to better understand the effect of environmental variability on the resilience of fishery systems, and the important role that social institutions and biophysical constraints play. To explore these issues, we built a dynamic model of the pen shell fishery of the indigenous Seri people in the Gulf of California, Mexico. This model included the dynamics of the two dominant species in the fishery (Atrina tuberculosa and Pinna rugosa), several institutional rules that the Seri use, and a number of ecological constraints, including key stochastic variables derived from empirical data. We found that modeling with multiple...
Tipo: Peer-Reviewed Reports Palavras-chave: Artisanal fisheries; Common-pool resources; Environmental variability; Gulf of California Mexico; Multi-species; Resilience; Social-ecological systems; Stochasticity; System dynamics.
Ano: 2013
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Responses of European anchovy vital rates and population growth to environmental fluctuations: An individual-based modeling approach ArchiMer
Pethybridge, Heidi; Roos, David; Loizeau, Veronique; Pecquerie, Laure; Bacher, Cedric.
A size-structured, bioenergetics model was implemented to examine the effects of short-term environmental changes on European anchovy, Engraulis encrasicolus, in the North-western Mediterranean Sea. The model approach was based on Dynamic Energy Budget (DEB) theory and details the acquisition and allocation of energy (J d(-1)) during an organisms' full life-cycle. Model calibration was achieved using biometric data collected from the Gulf of Lions between 2002 and 2011. Bioenergetics simulations successfully captured ontogenetic and seasonal growth patterns, including active growth in spring/summer, loss of mass in autumn/winter and the timing and amplitude of multi-batch spawning events. Scenario analysis determined that vital rates (growth and fecundity)...
Tipo: Text Palavras-chave: Engraulis encrasicolus; NW Mediterranean Sea; Environmental variability; Dynamic Energy Budget theory; Growth; Fecundity.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00127/23822/22490.pdf
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Spatial patterns in the condition index of the wild Pacific oyster Crassostrea gigas in a macrotidal coastal ecosystem: Influence of tidal processes and beyond ArchiMer
Gasmi, Sonia; Bernard, Ismael; Pouvreau, Stephane; Maurer, Daniele; Schaal, Gauthier; Ganthy, Florian; Cominassi, Louise; Allain, Gwenhael; Sautour, Benoit; David, Valerie.
In macrotidal coastal ecosystems, spatial heterogeneity of the water column properties is induced by both oceanic and continental influences. Hydrodynamic processes generate a land-sea gradient of environmental conditions, affecting the biological performances of sedentary organisms. The aim of the present study is to establish an extensive spatial assessment in the reproductive investment of the wild Pacific oyster Crassostrea gigas in Arcachon Bay. This is done by looking for a relationship between the Lawrence and Scott condition index (LSCI) and two tidal processes: the immersion level (IL) and the local oceanic flushing time (LoFt). The LSCI of C. gigas was assessed, just before gamete release, at 68 sampling stations in Arcachon Bay. Oyster...
Tipo: Text Palavras-chave: Reproductive investment; Crassostrea gigas; Macrotidal lagoon; Immersion level; Oceanic flushing; Environmental variability.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00357/46803/46670.pdf
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Variability of key biological parameters of round sardinella Sardinella aurita and the effects of environmental changes ArchiMer
Balde, Bocar Sabaly; Sow, Fambaye N.; Ba, Kamarel; Ekau, Werner; Brehmer, Patrice; Kantoussan, Justin; Fall, Massal; Diouf, Malick.
We examined growth rates and reproductive characteristics of Sardinella aurita off Senegal and other coastal areas over a 20 year period (1995-2014) to determine how they relate to variations in environmental characteristics of coastal waters. Based on fish length-frequency data and a coastal upwelling index, we found that S. aurita recruitment tends to occur during the periods of most intensive upwelling (March-April off Senegal). Peak reproduction corresponds to periods of low sea-surface temperature (in February or March). The sex ratio was remarkably consistent during the 30 year study period and so was not affected by environmental changes. We hypothesise that S. aurita takes advantage of the higher zooplankton productivity that occurs in coastal...
Tipo: Text Palavras-chave: Data poor fisheries; Environmental variability; Size structure; Small pelagic; Spawning period; West Africa.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00491/60229/67183.pdf
Registros recuperados: 4
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